JP5367012B2 - Lid opening / closing jig and lid opening / closing device - Google Patents

Description

  The present invention relates to a lid opening / closing jig and a lid opening / closing device for opening / closing a lid such as a manhole.

  A turbine for power generation installed in a general hydroelectric power station is connected to a generator shaft, and an impeller (runner) that rotates the shaft with the pressure of water, and a high speed fed by an iron pipe from a dam or river A casing that takes in high-pressure water and feeds it into the impeller is provided.

  The casing of such a power generation water turbine is provided with a manhole for checking the inside thereof. The manhole is closed with a (weight) lid so that it can withstand the pressure of high-speed and high-pressure water passing through the inside of the casing. For example, a manhole cover described in Patent Document 1 is used as this cover.

  The manhole cover described in Patent Document 1 is provided with an eyebolt mounting seat to which an eyebolt can be attached at the center thereof. An operator who checks the inside of the casing attaches an eyebolt to the eyebolt mounting seat, lifts the manhole cover vertically with a lifting tool such as a chain block, and opens the manhole.

  Such a lifting tool is suitable for opening a manhole whose opening is directed upward. However, when applied to a manhole whose opening is oriented in the horizontal direction (horizontal direction), when closing the manhole, the operator changes the position of the manhole cover from horizontal to vertical and then moves the manhole cover to this position. It had to be fixed to the manhole while keeping it, and the work was complicated.

  As described above, there is a (flange cover) opening / closing jig described in Patent Document 2 as a lid opening / closing device suitable for a manhole whose opening is directed in the lateral direction. The opening / closing jig includes a cylindrical portion that can be inserted into the tip of the lifter arm, and a round bar that protrudes from the cylindrical portion toward the tip of the lifter arm and is attached to the cylindrical portion.

  The inspector removes a part of the bolt that secures the manhole cover (cover) to the manhole, moves the lifter with the cylinder part of the opening / closing jig inserted into the arm, and inserts a round bar into the bolt hole from which the bolt has been removed. To support the manhole cover. The inspector also removes the remaining bolts for fixing the manhole, moves the lifter while the manhole cover is loaded on the round bar, and removes the manhole cover from the manhole.

Japanese Patent Laid-Open No. 2001-11878 JP 09-79381 A

  However, the opening / closing jig described in Patent Document 2 can be applied only when the opening of the manhole faces in the lateral direction. That is, the conventional opening / closing jig can only open and close the manhole whose opening is directed in a specific direction, and cannot open and close the lid according to the direction of the opening.

  Therefore, in view of such circumstances, an object of the present invention is to provide a lid opening / closing jig and a lid opening / closing device that can open and close the lid in accordance with the direction of the opening.

The lid opening / closing jig according to the present invention includes a coupling means capable of coupling the lid, and a long support means for supporting the coupling means, and the support means has a long shape having the coupling means at one end. Connecting means, angle changing means capable of changing the longitudinal angle of the connecting means, and moving means for setting the longitudinal direction of the connecting means to a predetermined angle and moving the connecting means forward and backward in the longitudinal direction of the connecting means And.

  According to such a configuration, by setting the longitudinal angle of the connecting means in the direction of the opening where the lid is closed, the connecting means moves the connecting means forward and backward in the longitudinal direction, so that the connecting means causes the connecting means to be separated from and attached to the lid. Can do. When opening the lid, the operator advances the coupling means of the coupling means toward the lid, couples the coupling means to the lid, removes the bolt that secures the lid to the opening, and removes the bolt while securing the lid. The coupling means is retracted to separate the lid from the opening. Moreover, what is necessary is just to perform in the reverse procedure to the case where it removes, when attaching a lid | cover to opening. Therefore, this lid opening / closing jig can open and close the lid in accordance with the direction of the opening, regardless of the direction of the lid.

Further , the angle changing means can change the angle of the connecting means in the longitudinal direction in accordance with the direction of the opening that the lid closes. Therefore, this lid opening / closing jig can open and close the lid in accordance with the direction of the opening, regardless of the direction of the lid.

  According to the invention, it is preferable that the angle changing means includes an angle restricting means for restricting an angle in a longitudinal direction of the connecting means.

  According to this configuration, the angle changing means can change the longitudinal angle of the connecting means in accordance with the direction of the opening that the lid closes, and can also restrict the rotation at that position. Therefore, when the operator couples the coupling means to the lid and removes the lid from the opening, the load on the lid is applied to the coupling means via the coupling means, and the longitudinal angle of the coupling means changes due to the load, that is, The connecting means can be prevented from rotating downward and the lid falling.

  According to the invention, the support means includes a first support member that supports the connection means, and a second support member that can support the first support member, and the angle changing means is The first support member is fixed to the first support member, has a rotation shaft in a direction intersecting the longitudinal direction of the connecting means, and the first support member has the rotation shaft as a rotation center with respect to the second support member. It is preferable to allow the rotation of.

  According to this configuration, while the connecting means is supported by the first support member, the connecting means provided at one end thereof is moved forward and backward by the moving means, and the rotation provided to the first support member by the second support member. While supporting the shaft, the angle changing means rotates the first support member around the rotation shaft. Therefore, the connecting means rotates the first support member around the rotation axis by the angle changing means in accordance with the direction of the opening that the lid closes, sets the angle in the longitudinal direction, and connects by the moving means. The lid is removed from the opening by advancing the means, coupling the coupling means to the lid, and retracting the coupling means as it is. That is, the connecting means can perform the angle change operation and the forward / backward movement operation to the lid separately, and can complete each operation.

  Further, according to the present invention, it is preferable that the moving means is a feed screw or a worm gear that is movable in the longitudinal direction of the male screw while the connecting means is a male screw. Further, it is preferable that the moving means is a rack-and-pinion in which the connecting means is a rack and the rack can be moved in the longitudinal direction by the pinion of the connecting means. According to such a configuration, the connecting means can be advanced and retracted in the axial direction with respect to the lid with a feed screw or a worm gear, and can be advanced and retracted in the axial direction with respect to the lid with a rack and pinion. it can.

  According to the present invention, the coupling means includes a coupling portion that can couple the lid, and a coupling portion that is fixed to the support means and that can couple the coupling portion, and the coupling portion is a coupling portion. Is preferably removable. According to such a configuration, the coupling means can be replaced in accordance with not only the direction of the opening in which the lid is closed but also the mounting structure to the lid (for example, the pitch and diameter of the thread groove).

  The lid opening / closing device according to the present invention is characterized in that the lid opening / closing jig is detachably or non-detachably provided, and further includes lifting means capable of raising and lowering the lid opening / closing jig.

According to such a configuration, by setting the longitudinal angle of the connecting means in the direction of the opening where the lid is closed, the connecting means moves the connecting means forward and backward in the longitudinal direction, so that the connecting means causes the connecting means to be separated from and attached to the lid. Can do. When opening the lid, the operator raises and lowers the elevating means so that the support means is in an appropriate position, advances the coupling means of the coupling means toward the lid, couples the coupling means to the lid, and opens the lid The bolt to be fixed to is removed, and the connecting means of the connecting means is moved backward while the cover is connected to separate the cover from the opening. Moreover, what is necessary is just to perform in the reverse procedure to the case where it removes, when attaching a lid | cover to opening. Therefore, regardless of the orientation of the lid, the lid opening / closing device can open and close the lid according to the direction of the opening.
Further, the angle changing means can change the angle of the connecting means in the longitudinal direction in accordance with the direction of the opening that the lid closes. Therefore, regardless of the orientation of the lid, the lid opening / closing device can open and close the lid according to the direction of the opening.

  As described above, according to the lid opening / closing jig and the lid opening / closing apparatus according to the present invention, the longitudinal direction of the coupling means is set to a predetermined angle in accordance with the direction of the opening, and the coupling means is advanced and retracted in the longitudinal direction of the coupling means. By moving, the lid can be opened and closed.

The side view of the lid opening / closing device concerning a 1st embodiment of the present invention is shown. The front view of the lid | cover opening / closing apparatus which concerns on the same embodiment is shown. Sectional drawing around the coupling | bonding means before couple | bonding with the manhole cover of the cover opening / closing apparatus which concerns on the embodiment is shown. Sectional drawing around the coupling | bonding means after couple | bonding with the manhole cover of the lid | cover opening / closing apparatus which concerns on the embodiment is shown. The side view around the support means of the lid | cover opening / closing apparatus which concerns on the embodiment is shown. Sectional drawing (in the arrow AA of FIG. 2) around the support means of the lid | cover opening / closing apparatus which concerns on the embodiment is shown. Sectional drawing (the arrow BB of FIG. 2) surrounding the support means of the lid | cover opening / closing apparatus which concerns on the embodiment is shown. The front view around the support means of the lid | cover opening / closing apparatus which concerns on the embodiment is shown. (A) And (b) shows process drawing explaining removal of the lid | cover by the lid | cover opening / closing apparatus based on the embodiment. (A) And (b) shows process drawing explaining removal of the lid | cover by the lid | cover opening / closing apparatus based on the embodiment. The disassembled perspective view around the angle change means of the lid | cover opening / closing apparatus which concerns on 2nd Embodiment of this invention is shown. The side view around the lid opening / closing jig of the lid opening / closing apparatus according to the third embodiment of the present invention is shown. (A) shows a front view around the coupling means of the lid opening / closing device according to the embodiment, and (b) shows around the coupling means ((a) arrow A- FIG. The front view around the support means of the lid | cover opening / closing apparatus which concerns on the embodiment is shown. (A) is a side view (in the direction of arrow AA in FIG. 14) around the support means of the lid opening / closing device according to the embodiment, and (b) is the support means of the lid opening / closing device according to the embodiment. FIG. 14 is a side view of the surroundings (in the direction of arrows BB in FIG. 14), and FIG. Show. Sectional drawing (arrow AA of FIG. 12) support means of the lid | cover opening / closing apparatus which concerns on the embodiment is shown.

  A lid opening / closing device according to a first embodiment of the present invention will be described with reference to FIGS. First, the outline | summary is demonstrated, referring FIG. 1 about the lid | cover which the lid | cover opening / closing apparatus which concerns on this embodiment opens / closes.

  In the present embodiment, a manhole cover (lid) 92 that closes a manhole (opening) 91 provided in the casing 9 of the power generation turbine will be described as an example. The manhole 91 is provided as an inspection hole for inspecting the inside of the casing 9. The lid opening / closing device 1 according to this embodiment is used to open / close the manhole lid 92 with respect to the manhole 91. The lid opening / closing device 1 is configured to be able to open and close regardless of the orientation of the manhole 91 and the manhole lid 92 that closes the manhole 91. In the present embodiment, as shown in FIG. 1 (side view), an example in which the manhole 91 and the manhole cover 92 are provided with an inclination of about 45 degrees with respect to a horizontal floor surface will be described.

  The manhole 91 is a substantially circular opening that penetrates the inside and outside of the casing 9, and is formed with a cylindrical opening end 91a that protrudes outward along the edge of the opening, and the opening end 91a. Bolt holes 91b provided at predetermined intervals along the circumferential direction on the outer side surface.

  The manhole cover 92 is made of a steel convex lid body 93 fitted into the opening end 91a of the manhole 91, and is disposed at the approximate center on the surface side of the lid body 93, and can generally be attached with an eyebolt or the like. A seat 94, provided on the outer peripheral surface of the lid body 93, and disposed on the outer surface of the opening end portion 91a of the manhole 91 and the grip portions 95, 95 that the operator grips, closes the gap between the lid body 93. In order to fix the sealing body 96 to the manhole 91, bolts 97 that can be screwed into the bolt holes 91b of the manhole 91 are provided. The mounting seat 94 includes a columnar base 94a formed to protrude from the lid body 93 to the surface side, as shown in FIG. A cylindrical fitting portion 94b provided on the front-side surface of the base portion 94a (a surface facing the lid main body 93) and having an internal thread cut on the inner peripheral surface thereof.

  Next, the configuration of the lid opening / closing device 1 according to the present embodiment will be described in detail with reference to FIGS.

  As shown in FIG. 1 (side view of the lid opening / closing device 1) and FIG. 2 (front view), the lid opening / closing device 1 according to the present embodiment opens and closes the manhole lid 92 with respect to the manhole 91. The tool 2 and the lifter 3 capable of disposing the lid opening / closing jig 2 at a position suitable for the opening / closing operation of the manhole lid 92 are provided.

  The lid opening / closing jig 2 includes coupling means 4 capable of coupling the mounting seat 94 of the manhole lid 92 and a long support means 5 for supporting the coupling means 4.

  As shown in FIG. 3 (a cross-sectional view in a state before being coupled to the manhole cover 92) and FIG. 4 (a cross-sectional view in a state after being coupled to the manhole cover 92), the coupling means 4 is attached to the manhole cover 92. The seat 94 can be replaced according to the fitting structure of the fitted portion 94b. That is, the coupling means 4 is prepared for each mounting seat 94 of each manhole cover 92. The coupling means 4 includes a coupling part 41 capable of coupling the mounting seat 94 of the manhole cover 92 and a coupling part 42 capable of coupling the support means 5.

  The coupling portion 41 includes a fitting convex portion 41a in which a male screw that can be fitted to the fitting portion 94b of the mounting seat 94 of the manhole cover 92 is cut on the outer peripheral surface, and a cylinder having the fitting convex portion 41a at the tip. A coupling base portion 41b having a shape and a rotation stop hole 41c penetrating at right angles to the axial direction of the coupling base portion 41b are provided.

  The connecting portion 42 includes a concave fitting recess 42a into which the coupling base 41b of the coupling portion 41 can be fitted, communication ports 42b and 42b provided to prevent the coupling base 41b from rotating, and a coupling that can be coupled to the coupling base 41b. A member 42c; and a fastening member 42d for tightening the connecting member 42c in order to fit the connecting member 42c into the recessed portion 42a.

  The fitting recess 42a can insert the coupling base 41b of the coupling portion 41 in the axial direction, and can fit the inserted coupling base 41b so as to be rotatable about the axis. That is, the fitting recess 42a is configured to be insertable while rotating the coupling base 41b in the axial direction from the opening side formed in the fitting recess 42a.

  The communication port 42b is an opening penetrating at a right angle to the cylindrical center direction of the fitting recess 42a. The communication port 42b is provided at a position where the connection base portion 41b can be communicated with the rotation stop hole 41c of the connection portion 41 in a state where the connection base portion 41b is fitted in the fitting recess 42a. In other words, the communication port 42b is provided to allow the connecting member 42c to pass therethrough to prevent the coupling base 41b fitted in the fitting recess 42a from rotating about the axis. 3 and 4, the communication port 42b is illustrated as an opening having substantially the same diameter as the rotation preventing hole 41c. However, the communication port 42b may be a long hole having a long diameter in the circumferential direction so that the connecting member 42c can be easily inserted. Or it is good also as an opening larger in diameter than the diameter of rotation prevention hole 41c.

  The connecting member 42 c is a bolt having an outer shape that can be inserted into the rotation stop hole 41 c of the coupling portion 41 and the communication ports 42 b and 42 b of the connecting portion 42. The connecting member 42c has a length capable of penetrating from one communication port 42b to the other communication port 42b. The connecting member 42c has a male screw cut at least on the distal end side. Specifically, when the connecting member 42c is inserted into one communication port 42b, at least a portion that may protrude from the other communication port 42b. The male thread is cut. Then, the connecting member 42c is inserted into the rotation stop hole 41c of the connecting portion 41 and the communication ports 42b and 42b of the connecting portion 42, so that the connecting portion 42 cannot rotate about the axis of the connecting portion 41, The rotation is prevented with respect to the portion 41.

  The tightening member 42d includes a nut having a female screw that can be screwed into the male screw of the connecting member 42c, and a plain washer and a spring washer that assist the tightening of the nut. The fastening member 42d is screwed into the male screw of the connecting member 42c inserted from one communication port 42b and projecting from the other communication port 42b. Therefore, the fastening member 42d can be attached to the fitting recess 42a so that the connecting member 42c does not fall off from the communication ports 42b, 42b of the fitting recess 42a.

  As shown in FIG. 5 (side view), the support means 5 includes an elongated connection means 51 having a connection means 4 (connection portion 42) at one end, and a first support member 52 that supports the connection means 51. (Refer to FIG. 6 and the like), the second support members 53 and 53 that can support the first support member 52, and the longitudinal direction of the connecting means 51 are set to a predetermined angle, and the longitudinal direction of the connecting means 51 The moving means 54 for moving the connecting means 4 forward and backward, the angle changing means 55 (see FIG. 8 etc.) capable of changing the angle of the connecting means 51 in the longitudinal direction, and the lid opening / closing jig 2 on the lifter 3 (elevating arm 31a). Mounting means 56 that can be mounted.

  As shown in FIG. 6 (cross-sectional view), the connecting means 51 has its tip end fixed to the surface of the connecting portion 42 opposite to the surface having the opening of the fitting recess 42a, and the cylindrical center of the fitting recess 42a is connected to the connecting means. The fitting recess 42a is fixed at a position coinciding with the axis 51. The connecting means 51 is a male screw portion 54c in which a male screw is formed from one end portion in the axial direction to the other end portion.

  As shown in FIGS. 6 and 8 (front view), the first support member 52 is a rectangular plate having a predetermined thickness, and a pair of opposed first surfaces 52 a that penetrate the connecting means 51. , 52a and a pair of second surfaces 52b, 52b orthogonal to the rotation axis when the first support member 52 rotates.

  As shown in FIGS. 5, 7 (cross-sectional views), and FIG. 8, the second support member 53 has a prismatic outer shape, and is formed on the second surfaces 52 b and 52 b of the first support member 52. They are arranged opposite to each other. The second support members 53, 53 support the first support member 52 in a rotatable manner by sandwiching the first support member 52. The second support members 53 and 53 include first surfaces 53a and 53a facing the second surfaces 52b and 52b of the first support member 52, and second surfaces facing the first surfaces 53a and 53a. Each of the surfaces 53b and 53b is provided.

  As shown in FIG. 6, the moving unit 54 includes a feed screw 54 a that can move in the axial direction (longitudinal direction) while rotating the connecting unit 51 around the axis, and a rotation that can rotate the connecting unit 51. Means 54b.

  The feed screw 54a passes through the male screw portion 54c of the connecting means 51 and the first surfaces 52a and 52a of the first support member 52, and the inner peripheral surface of the female screw that can be screwed with the male screw portion 54c. And a female screw portion 54d formed on the head. In other words, the feed screw 54 a receives the rotation of the connecting means 51 by screwing the male screw portion 54 c with the female screw portion 54 d, and performs the rotational movement around the axis of the connecting means 51 in the axial direction of the connecting means 51. Convert to linear motion.

  The male screw portion 54 c forms a left screw that is a reverse screw with respect to the screw formed on the peripheral surface of the fitting convex portion 41 a of the coupling portion 41. Therefore, although the male screw part 54c and the fitting convex part 41a are arrange | positioned on the same axis | shaft, they are not in the relationship tightened simultaneously by rotation of the connection means 51. FIG.

  The female screw portion 54d is formed so as to penetrate substantially the center of the first surfaces 52a, 52a of the first support member 52 in the orthogonal direction. The female screw portion 54d also has a function of pivotally supporting the connecting means 51.

  The rotating means 54b is a handle attached to the other end of the connecting means 51 and provided to rotate the connecting means 51 around the axis. The rotating means 54b rotates the connecting means 51, thereby rotating the male screw portion 54c formed on the peripheral surface of the connecting means 51 and moving the connecting means 51 in the axial direction. The rotating means 54b can advance the connecting means 51 in the axial direction (approach it to the manhole cover 92) by rotating counterclockwise around the axis of the connecting means 51 as a rotation center. The rotating means 54b can move the connecting means 51 backward (away from the manhole cover 92) by rotating clockwise around the axis of the connecting means 51 as the center of rotation.

  As shown in FIG. 8, the angle changing means 55 includes rotating shafts 55 a and 55 a that serve as an axis when the first support member 52 rotates with respect to the second support members 53 and 53, The support members 53, 53 are formed so as to penetrate from the first surfaces 53a, 53a to the second surfaces 53b, 53b, and support shafts 55b for supporting the rotation shafts 55a, 55a, and the rotation shafts. Angle restricting means 55c and 55c for restricting the rotation of 55a and 55a.

  The rotation shafts 55a and 55a are provided on the second surfaces 52b and 52b of the first support member 52, respectively. The rotation shafts 55a and 55a are fixed so that their respective axes coincide with the second surfaces 52b and 52b of the first support member 52 and are orthogonal to the respective surfaces. The rotation shafts 55a, 55a are inserted into the shaft support holes 55b,... And the first surfaces 53a, 53a of the second support members 53, 53 are inserted into the second surfaces 52b, 52b of the first support member 52. In a state where the two are in contact with each other, at least a male screw is formed in a range protruding from the shaft support holes 55b, 55b on the second surface 53b, 53b side of the second support member 53.

  The shaft support holes 55b,... Are holes that penetrate from the first surfaces 53a, 53a of the second support members 53, 53 to the second surfaces 53b, 53b with their centers aligned. The shaft support holes 55b,... Rotatably support the inserted rotation shafts 55a, 55a.

  The angle restricting means 55c, 55c includes a nut having a female screw that can be screwed into a male screw of the rotation shafts 55a, 55a, and a plain washer and a spring washer for assisting the tightening of the nut. The angle restricting means 55c, 55c are inserted into the pivot shafts 55a, 55a through the shaft support holes 55b,... And protrude from the shaft support holes 55b, 55b on the second surface 53b, 53b side of the second support member 53. The rotating shafts 55a and 55a are fixed to the second support members 53 and 53 so as not to rotate by screwing into the male screws of the rotating shafts 55a and 55a. Further, the angle restricting means 55c, 55c restricts the movement of the second support members 53, 53 in the axial direction of the rotation shafts 55a, 55a. Further, the angle restricting means 55c and 55c loosely tighten the rotating shafts 55a and 55a, thereby supporting the rotating shafts 55a and 55a on the second support members 53 and 53 so as to be rotatable.

  As shown in FIGS. 7 and 8, the mounting means 56 inserts the lifting arms 31 a and 31 a of the long lifter 3 for mounting the lid opening / closing jig 2 and mounts the support means 5 to the lifter 3. Mounting portions 56a, 56a, and fixing means 56b,... For fixing the mounting portions 56a, 56a to the elongate lifting arms 31a, 31a.

  The mounting portions 56a and 56a are holes through which the lifting arms 31a and 31a of the lifter 3 extending from one end to the other end in the longitudinal direction of the second support members 53 and 53 can be inserted. That is, the mounting portions 56a and 56a are cylindrical bodies having a rectangular outer shape. The mounting portions 56a and 56a have an inner diameter substantially equal to the width of the lifting arms 31a and 31a, and have an inner diameter wider (higher) than the thickness (height) of the lifting arms 31a and 31a.

  The fixing means 56b,... Are inserted through the insertion openings 56c,... Opened at the lower surface of the attachment portion 56a, and the insertion openings 56c,... And the lifting arms 31a, 31a inserted into the attachment portions 56a, 56a are attached to the attachment portions. , And pressing members 56d, which are pressed against the inner surfaces of 56a, 56a, and fixing members 56e, which fix the lifting arms 31a, 31a against the mounting portions 56a, 56a with the pressing members 56d,.

  The insertion ports 56c,... Are arranged one by one on both sides in the longitudinal direction of the mounting portions 56a, 56a. The insertion openings 56c,... Are internally threaded with taps or the like. The pressing members 56d,... Are hexagonal bolts provided on the outer peripheral surface with male screws corresponding to the female screws of the insertion ports 56c,.

  Therefore, the fixing means 56b,... Fasten the pressing members 56d,... To fix the lifting arms 31a, 31a against the inner peripheral surfaces of the fixing means 56b,.

  As shown in FIGS. 1 and 2, the lifter 3 is capable of traveling to a position suitable for opening / closing the manhole cover 92 with the lid opening / closing jig 2 and the lifting / lowering means 31 that can lift and lower the lid opening / closing jig 2. Means 32.

  The elevating means 31 includes elevating arms 31a, 31a capable of supporting the mounting portions 56a, 56a of the lid opening / closing jig 2, and an elevating mechanism 31b for elevating the elevating arms 31a, 31a. The elevating arms 31a and 31a are two elongated members that are arranged substantially horizontally with respect to the installation surface and are arranged substantially parallel to each other. The elevating mechanism 31b is configured to be able to be lifted and hung so as to raise and lower the elevating arms 31a and 31a in the vertical direction. The elevating mechanism 31b according to the present embodiment includes a mechanism for manually elevating and converting the rotational movement of the handle into the vertical movement of the elevating arms 31a and 31a. Therefore, the elevating mechanism 31b can adjust the elevating amounts of the elevating arms 31a and 31a, that is, the positions (heights) of the elevating arms 31a and 31a, according to the rotation amount of the handle.

  The traveling means 32 operates (pushes or pulls) the lifter 3 in order to move the lifter 3 forward or backward by rotating the wheels 32a,... Are provided with a handle 32b, 32b, a lock mechanism 32c for restricting the rotation of the wheels 32a,..., And a course changing means 32d capable of changing the course of the lifter 3 by changing the direction of the wheels 32a,.

  Next, the lid opening / closing operation by the lid opening / closing apparatus 1 according to the present embodiment will be described with reference to the entire external view (side view) of FIGS. 9 and 10. First, an operation for opening the manhole cover 92 from the manhole 91 will be described.

  First, as shown in FIG. 9A, the coupling portion 41 (coupling means 4) of the lid opening / closing jig 2 is attached to the mounting seat 94 of the manhole lid 92. That is, the coupling portion 41 having the fitting convex portion 41a that matches the structure of the mating portion 94b of the mounting seat 94 (the form of the female screw pitch, height, winding direction, etc.) is selected. The coupling portion 41 and the mounting seat 94 are coupled by screwing the mating convex portion 41 a into the fitted portion 94 b of the mounting seat 94.

  Next, as shown in FIG. 9B, the lid opening / closing jig 2 is attached to the lifting arm 31 a (lifting means 31) of the lifter 3. Specifically, the lid opening / closing jig 2 operates the moving means 54 to move the connecting means 51 forward (approach the manhole cover 92), on the extension line in the axial direction of the coupling base 41 b of the coupling part 41. It is mounted at the position of the lifting arm 31a where the center of the cylinder is substantially coincident. At this time, the lid opening / closing jig 2 changes the height of the lifting / lowering arm 31a by using the lifting / lowering means 31 of the lifter 3 and changes the arrangement of the lifter 3 by using the traveling means 32. Mounted on the arm 31a.

  That is, the lifter 3 is disposed at a position suitable for opening and closing the manhole cover 92 when the handles 32b and 32b are pushed by the operator. Specifically, the lifter 3 is disposed so that the manhole cover 92 is located in front. The lift arms 31 a and 31 a of the lifter 3 are moved up and down to a height at which the connecting means 51 reaches the mounting seat 94 of the manhole cover 92.

  The lid opening / closing jig 2 mounts the mounting portion 56a of the mounting means 56 on each of the lift arms 31a and 31a. The mounting portions 56 a and 56 a are mounted at the positions of the lifting arms 31 a and 31 a where the connecting means 51 reaches the mounting seat 94 of the manhole cover 92. Note that the mounting portions 56a and 56a are preferably disposed in the vicinity of the center in the longitudinal direction of the elevating arms 31a and 31a. When the mounting portions 56a, 56a are mounted closer to the distal end side (front side) of the lifting arms 31a, 31a, the center of gravity of the lifter 3 is the lifting arms 31a, 31a when the lid opening / closing jig 2 receives the manhole cover 92. This is because the lifter 3 may fall to the front side.

  In the moving means 54, when the connecting means 51 is rotated about the rotating shaft 55a, the connecting means 51 or the connecting portion 42 fixed to one end of the connecting means 51 is the mounting seat 94 of the manhole cover 92. The rotating means 54b is operated and retracted to the extent that it does not interfere with the coupling portion 41 coupled to (moves to the back side).

  The angle changing means 55 rotates the connecting means 51 around the turning shaft 55a, and the center of the cylinder of the connecting base 41b of the connecting portion 41 substantially coincides with the extension line in the axial direction of the connecting means 51. Change to angle. If the angle changing means 55 is known to be inclined 45 degrees with respect to the floor (horizontal direction) like the manhole cover 92 according to the present embodiment, the lid opening / closing jig 2 The angle of the connecting means 51 may be changed to 45 degrees before attaching to the lifting arms 31a, 31a of the lifter 3.

  In this way, when the lid opening / closing jig 2 is disposed at an appropriate position of the elevating arms 31a, 31a, the angle regulating means 55c, 55c of the angle changing means 55 regulates the rotation of the connecting means 51, and the connection is made. The inclination angle of the means 51 is fixed. Further, the lid opening / closing jig 2 is fixed to the lifting arms 31 a and 31 a of the lifter 3 by the fixing means 56 b of the mounting means 56. Specifically, in the lid opening / closing jig 2, the pressing members 56d,... Are inserted into the insertion openings 56c,... Of the mounting means 56 in a state where the mounting portions 56a, 56a are disposed at appropriate positions of the elevating arms 31a, 31a. It fastens and presses against the lifting arms 31a, 31a, and the lifting arms 31a, 31a are fixed by being sandwiched between the inner surfaces of the mounting portions 56a, 56a and the tip portions of the pressing members 56d,. Furthermore, the rotation of the wheel 32a is restricted by the lock mechanism 32c of the traveling means 32 of the lifter 3, and the lifter 3 is fixed at that position.

  Next, as shown in FIG. 10A, the moving unit 54 rotates the rotating unit 54 b to advance the connecting unit 51 toward the coupling portion 41. The moving means 54 advances the connecting means 51 until the coupling base portion 41b of the coupling portion 41 is fitted into the fitting concave portion 42a of the coupling portion 42 fixed to the tip thereof. At that time, the connecting portion 42 moves forward while rotating together with the connecting means 51, but can move in the axial direction inside the fitting recess 42 a while the connecting portion 41 rotates around the axis. .

  After the connecting means 51 is advanced until the fitting recess 42a is fitted into the coupling base 41b of the coupling part 41, the coupling part 41 inserts the coupling member 42c into the communication ports 42b, 42b and the rotation stop hole 41c of the coupling part 42. Then, it is tightened by the tightening member 42 d and connected to the connecting portion 42. That is, the manhole cover 92 is supported by the connecting means 51 (support means 5).

  Thereafter, the manhole cover 92 is removed from the manhole 91 by removing the bolts 97. Of course, the manhole cover 92 is supported by the connecting means 51 (support means 5), and it is not necessary for the operator to grip and support the grip portion 95.

  Subsequently, as shown in FIG. 10 (b), the rotating means 54 b of the moving means 54 is operated to retract the connecting means 51, and the manhole cover 92 is removed from the manhole 91. At this time, since the manhole cover 92 moves on the center line of the manhole 91, the manhole cover 92 is separated from the manhole 91 without the convex cover body 93 interfering with the cylindrical opening end of the manhole 91. Can do. In addition, the connecting means 51 moves the connecting means 51 backward while rotating to the right. However, the coupling portion 41 fixed to the tip of the connecting means 51 rotates in the direction to be tightened with respect to the mounting seat 94 of the manhole cover 92 (right-turned). Therefore, the fitting convex portion 41a of the connecting portion 41 is not loosened. When the manhole cover 92 is moved to another location, the lock mechanism 32c of the lifter 3 may be released and moved by the traveling means 32.

  Note that the operation for closing the manhole cover 92 may be performed in the reverse order of the opening operation, and thus the description thereof is omitted.

  Thus, by setting the longitudinal angle of the connecting means 51 in the direction of the opening in which the manhole cover 92 is closed and moving the connecting means 51 forward and backward, the connecting means 51 causes the connecting means 4 to move the connecting means 4 to the manhole cover. 92 can be separated. When the operator opens the manhole cover 92, the operator raises and lowers the elevating means 31 so that the support means 5 is in an appropriate position, and advances the coupling means 4 of the connecting means 51 toward the manhole cover 92. Is coupled to the manhole cover 92, the bolt for fixing the manhole cover 92 to the opening is removed, and the connecting means 4 of the connecting means 51 is moved backward while the manhole cover 92 is connected to separate the manhole cover 92 from the opening. Moreover, what is necessary is just to perform in the reverse procedure to the case where it removes, when attaching the manhole cover 92. FIG. Therefore, the lid opening / closing jig 1 can open and close the manhole cover 92 according to the direction of the opening, regardless of the manhole cover 92 provided in any direction.

  Further, the angle changing means 55 can change the angle in the longitudinal direction of the connecting means 51 in accordance with the direction of the opening where the manhole cover 92 is closed. Therefore, the lid opening / closing jig 1 can open and close the manhole cover 92 according to the direction of the opening, regardless of the manhole cover 92 provided in any direction.

  The angle changing means 55 can change the longitudinal angle of the connecting means 51 in accordance with the direction of the opening that the manhole cover 92 closes, and can restrict the rotation at that position. Therefore, when the operator couples the coupling means 4 to the manhole cover 92 and removes the manhole cover 92 from the opening, the load of the manhole cover 92 is applied to the coupling means 51 via the coupling means 4, and the coupling means is caused by the load. It is possible to prevent the angle of the longitudinal direction of 51 from being changed, that is, the connecting means 51 is rotated downward and the manhole cover 92 is dropped.

  Further, while supporting the connecting means 51 with the first support member 52, the connecting means 4 provided at one end thereof is moved forward and backward by the moving means 54, and the first support member 52 is supported by the second support member 53. Meanwhile, the first support member 52 is rotated around the rotation axis by the angle changing means 55. Therefore, the connecting means 51 is rotated around the rotation axis of the first support member 52 by the angle changing means 55 in accordance with the direction of the opening where the manhole cover 92 is closed, and the angle in the longitudinal direction is set. The connecting means 4 is moved forward by the moving means 54, the connecting means 4 is connected to the manhole cover 92, and the connecting means 4 is moved back as it is to remove the manhole cover 92 from the opening. That is, the connecting means 51 can separately perform the angle changing operation and the forward / backward movement operation to the manhole cover 92, and can complete each operation.

  Further, the connecting means 51 can be moved back and forth in the axial direction with respect to the manhole cover 92 by the feed screw 54a, and the manhole cover 92 connected to the connecting means 4 by rotating the connecting means 51 about the axis. However, the coupling means 4 is not driven by the coupling means 51. Therefore, the connecting means 51 can prevent the bolt 97 fixing the manhole cover 92 from being broken in the opening by rotating the manhole cover 92 while the manhole cover 92 is fixed to the opening. Further, the coupling means 4 can be replaced in accordance with not only the direction of the opening where the manhole cover 92 is closed but also the mounting structure (for example, the pitch and diameter of the screw groove).

  Next, a lid opening / closing device according to a second embodiment of the present invention will be described with reference to FIG. 11 (perspective view). In addition, about the same structure as the lid | cover opening / closing apparatus 1 which concerns on 1st Embodiment, while attaching the same code | symbol, the description is abbreviate | omitted. Specifically, since the second embodiment is an example of a different embodiment of the angle changing means 55 of the lid opening / closing device 1 according to the first embodiment, the angle changing means will be mainly described below. .

  Similar to the first embodiment, the lid opening / closing device 101 according to the present embodiment includes a lid opening / closing jig 102 provided with the coupling means 4 and the support means 105, and the lifter 3. The support means 105 includes angle selection means 155d and 155d that can arbitrarily select the angle of the connection means 51 in the angle changing means 55 according to the first embodiment.

  The angle selection means 155d, 155d are convex projections 155e, 155e,... Projecting in parallel to the axial direction of the rotation shafts 55a, 55a on the second surface 52b of the first support member 52 of the support means 105. And the first surfaces 53a, 53a of the second support members 53, 53 are provided with concave latching portions 155f,... Parallel to the center line of the shaft support holes 55b,.

  The protrusions 155e,... Are provided at least at one or more locations and are preferably provided on the second surface 52b of the first support member 52, respectively, but may be provided only on one surface. .. Are provided on the first surface 53a of the second support member 53 opposite to the second surface 52b of the first support member 52 provided with the projections 155e,.

  A plurality of the latching portions 155f,... Are arranged at a distance from the center line of the shaft support hole 55b that is the same as the distance at which the axial centers of the projections 155e,. .. Are provided at predetermined angles, preferably at intervals of 45 degrees, around the shaft support hole 55b.

  By configuring in this way, the angle changing means 155 changes the angle of the rotation shaft 55a from a plurality of latching portions 155f provided on the second support members 53, 53 to a set of latching portions 155f, 155f. By selecting and selecting the protrusions 155e and 155e provided on the first support member 52, the angle of the connecting means 51 can be set to a specific angle. According to the angle selection unit 155d according to the present embodiment, it is possible to cope with eight types of angles of 0 degree, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, 270 degrees, and 315 degrees. The angle changing means 155 can change the selectable angles and the number of options by changing the positions (pitch, number, etc.) of the latching portions 155f,.

  Further, the angle changing means 155 also has a function of preventing rotation about the axis of the rotation shaft 55a, that is, functions as angle restriction means. In other words, the angle selection unit 155d according to the present embodiment can prevent the rotation of the rotation shaft 55a around the axis, and the angle restriction unit 55c mainly includes the second rotation shaft 55a with respect to the second rotation shaft 55a. The movement of the support member 53 in the axial direction is restricted.

  Next, a lid opening / closing device according to a third embodiment of the present invention will be described with reference to FIGS. In addition, about the same structure as the lid | cover opening / closing apparatuses 1 and 101 which concern on 1st and 2nd embodiment, while attaching the same code | symbol, the description is abbreviate | omitted.

  Similar to the first embodiment, the lid opening / closing device 201 according to the present embodiment includes a lid opening / closing jig 202 provided with a coupling unit 204 and a support unit 205, and the lifter 3.

  As shown in FIG. 12 (side view), FIG. 13 (a) (front view), and FIG. 13 (b) (cross-sectional view), the coupling means 204 is similar to the first and second embodiments. And a connecting portion 242.

  The coupling portion 241 includes a fitting convex portion 41a, a prismatic coupling base portion 241b having the fitting convex portion 41a at the tip, a connecting hole 241c penetrating at right angles to the axial direction of the coupling base portion 241b, Is provided.

  The connecting portion 242 includes a concave fitting recess 242a into which the coupling base 241b of the coupling portion 241 can be fitted, and communication ports 242b and 242b provided to prevent the coupling base 241b of the coupling portion 241 from coming off in the axial direction. A connecting member 42c and a tightening member 42d are provided. The fitting recess 242a is fitted by inserting the coupling base 241b of the coupling part 241 in the axial direction. The communication ports 242b and 242b are openings penetrating at right angles to the cylinder center direction of the fitting recess 242a. The communication ports 242b and 242b are provided at positions where the coupling base portion 241b can be communicated with the connection hole 241c of the coupling portion 241 in a state where the coupling base portion 241b is fitted into the fitting concave portion 242a. That is, the communication ports 242b and 242b are provided for inserting the connecting member 42c in order to prevent the coupling base portion 241b fitted in the fitting concave portion 242a from coming off in the axial direction.

  As shown in FIGS. 12 and 14 (cross-sectional views), the support unit 205 includes a connection unit 251, a first support member 252, a second support member 253, as in the first and second embodiments. 253, a moving unit 254, an angle changing unit 255, and mounting units 56 and 56.

  The connecting means 251 is a rack 254d having teeth (gears) cut from one end to the other end in the axial direction.

  The moving means 254 is shown in FIG. 15A (cross-sectional view taken along the line AA in FIG. 14), FIG. 15B (cross-sectional view taken along the line BB in FIG. 14), and FIG. 14, which is a cross-sectional view taken along the line CC of FIG. 14, a rack and pinion 254 a that can move the connecting means 251 in the axial direction (longitudinal direction), and the rack and pinion 254 a can be driven. Drive means 254b and drive restriction means 254c for restricting driving of rack and pinion 254a are provided.

  The rack and pinion 254a moves in the axial direction between the rack 254d of the connecting means 251, the pinion 254e disposed opposite to the rack 254d so as to mesh with the rack 254d, and the pinion 254e. A guide member 254f for guiding the removal, and a drop prevention means 254g provided at the other end in the axial direction of the connecting means 251 to prevent the rack 254d from dropping from the pinion 254e. That is, the rack and pinion 254a converts the rotational movement of the pinion 254e into a linear movement in the axial direction of the connecting means 251 by engaging the rack 254d with the pinion 254e.

  The driving means 254b is a handle that is directly connected to the rotation shaft 254h of the pinion 254e and rotates the rotation shaft 254h.

  The drive restricting means 254c is directly connected to a ratchet gear 254k that is directly connected to the rotation shaft 254h of the pinion 254e, a ratchet claw 254m that can be engaged with the teeth of the ratchet gear 254k, and a support shaft 254n of the ratchet claw 254m. Switching means 254p that can switch the attitude of the ratchet claw 254m.

  The ratchet gear 254k and the ratchet claw 254m constitute a ratchet and regulate the rotation of the rotation shaft 254h of the pinion 254e. That is, the ratchet gear 254k meshes with the ratchet claw 254m so that the rack 254d allows the pinion 254e to move forward in the axial direction, and the rack 254d retracts the connecting means 251 in the axial direction. The rotation of the pinion 254e is restricted.

  By changing the position of the ratchet claw 254m, the switching means 254p can separate the ratchet claw 254m meshed with the ratchet gear 254k, and makes the pinion 254e rotatable. Therefore, the switching means 254p switches the posture in which the ratchet claw 254m meshes with the ratchet gear 254k, so that the driving means 254b can be moved forward (drawn) in the axial direction of the connecting means 251 while being retracted ( (Repeat) operation becomes impossible. Further, the switching unit 254p switches to a posture in which the ratchet claw 254m is separated from the ratchet gear 254k, so that the driving unit 254b can move forward and backward in the axial direction of the connecting unit 251.

  As shown in FIGS. 15 and 16 (cross-sectional views), the angle changing means 255 includes support shafts 255a and 255a for supporting the first support member 252 on the second support members 253 and 253, and the first support member. 252 formed through the second surfaces 252b, 252b of the 252 and the first surfaces 253a, 253a of the second support members 253, 253 to the second surface 253b, Second shaft support holes 255c formed penetrating up to 253b, angle restricting means 55c, 55c for restricting rotation of the support shafts 255a, 255a with respect to the shaft support holes 255b,. Is provided.

  The support shafts 255a and 255a include at least two bolts. Each of the support shafts 255a and 255a includes a second shaft support hole 255c on the first surface 253a, a second support hole 255c on the second surface 253b side of the second support member 253, and a first support. The first shaft support holes 255b and 255b of the second surface 252b of the member 252, the second shaft support hole 255c on the first surface 253a side of the other second support member 253, and the second surface 253b It is a volt | bolt which has the length which can be penetrated to the 2nd shaft support hole 255c of the side. Each support shaft 255a, 255a is inserted from a second shaft support hole 255c, 255c provided in one second support member 253, and a second shaft support hole 255c provided in the other second support member 253. , 255c, and at least a male screw in the range protruding from it.

  The first shaft support holes 255b,... And the second shaft support holes 255c,... Are holes having diameters through which the support shafts 255a, 255a can be inserted. The first shaft support holes 255b, ... and the second shaft support holes 255c, ... support the support shafts 255a, 255a to be inserted.

  The first shaft support holes 255b,... Have support shafts 255a that penetrate the second surfaces 252b and 252b of the first support member 252 in a direction perpendicular to the second surfaces 252b and 252b. These are a plurality of holes arranged on a circumference centered on an intermediate position with a distance of 255a as a diameter. The first shaft support holes 255b of the present embodiment are arranged at intervals of 45 degrees, and are arranged so as to be line symmetric with respect to a line passing through the center.

  The second shaft support holes 255c are formed on the first surfaces 253a and 253a and the second surfaces 253b and 253b of the second support member 253, and the first surfaces 253a and 253a and the second surfaces 253b, The support shafts 255a and 255a penetrating in parallel to each other in the orthogonal direction with respect to 253b are spaced apart and arranged in parallel.

  The first shaft support holes 255b,... Are connected by selecting the first shaft support holes 255b, 255b into which the support shafts 255a, 255a are inserted from the plurality of first shaft support holes 255b,. It functions as an angle selection means that can select 251 angles.

  With this configuration, the angle changing means 255 inserts the support shafts 255a, 255a into the second shaft support holes 255c,... And connects the connecting portion 241 on the extension line in the axial direction of the connecting means 251. The support shafts 255a and 255a are inserted by selecting a combination of the first shaft support holes 255b and 255b having an angle at which the center of the cylindrical center of the base 241b substantially coincides. Therefore, the angle changing unit 255 can change the angle of the connecting unit 251 so as to be selectable.

  In the moving means 254, when the attachment portion 56a of the attachment means 56 is attached to each of the lift arms 31a, 31a, the connection means 251 or the connection portion 242 fixed to one end of the connection means 251 is attached to the manhole cover 92. The drive means 254b is operated and moved backward (moved to the back side) to the extent that it does not interfere with the coupling portion 241 coupled to the seat 94.

  The lid opening / closing jig 202, after mounting the mounting portion 56a of the mounting means 56 on each of the lifting arms 31a, 31a, switches the switching means 254p to a position where the ratchet claw 254m meshes with the ratchet gear 254k, and drives the driving means 254b. Thus, the connecting means 251 can be advanced (drawn) in the axial direction.

  In addition, when the coupling portion 241 is coupled to the mounting seat 94 of the manhole cover 92 and the bolt 97 for fixing the manhole 91 is removed, the load of the manhole cover 92 is applied to the connecting means 251 via the coupling portion 241. Even so, the switching means 254p switches the ratchet claw 254m to a position in which the ratchet claw 254m meshes with the ratchet gear 254k, and when the force is applied in the direction in which the connecting means 251 moves backward, the pinion 254e rotates to move the connecting means 251 backward. There is nothing.

  On the other hand, the lid opening / closing jig 202 switches the switching means 254p to a position in which the ratchet claw 254m is separated from the ratchet gear 254k, drives the driving means 254b, and retracts the connecting means 251 in the axial direction (rewinds). )be able to. When the switching unit 254p is in this posture, the driving unit 254b can perform either forward or backward operation of the connecting unit 251 in the axial direction.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  The lid opening / closing device 1, 101, 201 according to the above embodiment has been described as an example applied to a manhole 91 that can be opened and closed in order to inspect the inside of the casing 9 such as a Francis turbine or a propeller turbine. It is not limited. For example, a lid opening / closing device closes a manhole provided in a boiler container of a combustion boiler, a manhole provided in a large-diameter duct of a supply / exhaust facility, a cleaning hole provided in a flue for cleaning the inside ( Can be applied to manhole) lid.

  In the lid opening / closing devices 1, 101, 201 according to the above embodiment, the example in which the manhole 91 and the manhole lid 92 are provided with an inclination of about 45 degrees with respect to the horizontal floor surface is described, but the present invention is not limited thereto. Absent. For example, the lid opening / closing device according to the present invention can be applied to a lid whose opening is directed at various angles such as a downward direction, a side (lateral) direction, an upward direction, and the like. Such a lid is not suitable for lifting by a chain block or the like because the opening is not opened upward, but can be applied to any lid opening / closing device according to the present invention.

  In the lid opening / closing jigs 1 and 101 according to the first and second embodiments, the moving means 54 is a feed screw 54a composed of a male screw part 54c and a female screw part 54d, and the rotating means (handle) 54b is rotated. The example in which the movement is converted into the linear movement in the axial direction of the connecting means 51 and moved is described, but the present invention is not limited to this. For example, in the moving means 54, the female screw portion 54d may be a change nut or a ball screw, or may be a worm gear (worm and worm wheel), and the rotational movement of the rotating means is controlled in the axial direction of the connecting means. May be converted into a linear motion, and the rotational torque may be reduced or the feeding speed of the connecting means may be increased.

  Although the lid opening / closing devices 1, 101, 201 according to the above embodiment have been described with respect to the example in which the lid opening / closing jigs 2, 102, 202 are attached to the lifter 3 and opened / closed, the present invention is not limited thereto. For example, the lid opening / closing apparatus according to the present invention may be one in which a lifting / lowering means and a traveling means of a lifter are integrally provided in a lid opening / closing jig. The lid opening / closing device may use a forklift instead of the lifter 3. The lid opening / closing device using the forklift is suitable for opening and closing heavy and large manholes. At this time, the lid opening / closing jig according to the present invention is used by being mounted on a claw (fork) of a forklift. Further, the lifter used in the lid opening / closing device is not limited to a manual operation, and may be an electric operation.

  In the lid opening / closing devices 1, 101, 201 according to the above-described embodiment, the example in which the rotation unit 54b and the driving unit 254b are handles has been described, but the present invention is not limited thereto. For example, the rotation means and the drive means may rotate the feed screw or pinion with an electric motor or the like.

  DESCRIPTION OF SYMBOLS 1 ... Lid opening / closing device, 2 ... Lid opening / closing jig, 3 ... Lifter, 4 ... Coupling means, 5 ... Supporting means, 9 ... Casing (of water turbine for power generation), 31 ... Lifting means, 31a ... Lifting arm, 31b ... Lifting Mechanism, 32 ... Traveling means, 32a ... Wheel, 32b ... Handle, 32c ... Lock mechanism, 32d ... Path changing means, 41 ... Coupling part, 41a ... Fitting convex part, 41b ... Coupling base part, 41c ... Anti-rotation hole, 42 ... Connection part, 42a ... Insertion recess, 42b ... Communication port, 42c ... Connection member, 42d ... Fastening member, 51 ... Support means, 52 ... First support means, 52a ... First surface, 52b ... Second Surface 53, second support member, 53a, first surface, 53b, second surface, 54, moving means, 54a, feed screw, 54b, rotating means, 54c, male screw portion, 54d, female screw. 55, angle changing means, 55a, rotating shaft, 55 ... shaft support hole, 55c ... angle regulating means, 56 ... mounting means, 56a ... mounting part, 56b ... fixing means, 56c ... insertion port, 56d ... pressing member, 91 ... manhole (opening), 91a ... opening end, 91b ... Bolt hole, 92 ... Manhole cover (lid), 93 ... Lid body, 94 ... Mounting seat, 94a ... Base part, 94b ... Fitted part, 95 ... Gripping part, 96 ... Packing, 97 ... Bolt, 101 ... Lid opening / closing Device 102: lid opening / closing jig 105 ... support means 155 ... angle changing means 155d ... angle selection means 155e ... projection part 155f ... latching part 201 ... lid opening / closing apparatus 202 ... lid opening / closing jig, 204: coupling means, 205: support means, 241 ... coupling portion, 241b ... coupling base, 241c ... coupling hole, 242 ... coupling section, 242a ... fitting recess, 242b ... communication port, 251 ... coupling means, 252 ... first 252a ... first surface, 252b ... second surface, 253 ... second support member, 253a ... first surface, 253b ... second surface, 254 ... moving means, 254a ... rack and Pinion, 254b ... drive means, 254c ... drive limiting means, 254d ... rack, 254e ... pinion, 254f ... guide means, 254g ... drop-off prevention means, 254h ... rotating shaft, 254k ... ratchet gear, 254m ... ratchet claw, 254n ... support shaft, 254p ... switching means, 255 ... angle changing means, 255a ... support shaft, 255b ... first shaft support hole, 255c ... second shaft support hole

Claims (7)

A coupling means capable of coupling the lid; and an elongate supporting means for supporting the coupling means,
The support means includes a long connecting means having a connecting means at one end, an angle changing means capable of changing an angle in the longitudinal direction of the connecting means , and a longitudinal direction of the connecting means is set to a predetermined angle. A lid opening / closing jig comprising: moving means for moving the connecting means forward and backward in the longitudinal direction of the connecting means. The lid opening / closing jig according to claim 1 , wherein the angle changing unit includes an angle regulating unit that regulates an angle in a longitudinal direction of the connecting unit. The support means includes a first support member that supports the connection means, and a second support member that can support the first support member,
The angle changing means is fixed to the first support member, has a rotation shaft in a direction intersecting the longitudinal direction of the connection means, and the rotation shaft is the rotation center with respect to the second support member. cover opening and closing jig according to claim 1 or 2, allows the rotation of the first support member. The lid opening / closing jig according to any one of claims 1 to 3 , wherein the moving means is a feed screw or a worm gear that has a male screw as a connecting means and is movable in a longitudinal direction of the male screw. The lid opening / closing treatment according to any one of claims 1 to 3 , wherein the moving means is a rack-and-pinion in which the connecting means is a rack and the rack can be moved in the longitudinal direction by a pinion of the connecting means. Ingredients. The coupling unit includes a coupling unit that can couple the lid, and a coupling unit that is fixed to the support unit and that can couple the coupling unit, and the coupling unit is detachable from the coupling unit. The lid opening / closing jig according to any one of to 5 . A lid opening / closing device comprising the lid opening / closing jig according to any one of claims 1 to 6 , wherein the lid opening / closing jig is detachable or non-detachable, and further includes an elevating means capable of raising and lowering the lid opening / closing jig.

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